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LM2990 - Negative Low Dropout Regulator

Download the LM2990 datasheet PDF. This datasheet also covers the LM2 variant, as both devices belong to the same negative low dropout regulator family and are provided as variant models within a single manufacturer datasheet.

General Description

The LM2990 is a three-terminal, low dropout, 1 ampere negative voltage regulator available with fixed output voltages of 5, 5.2, 12, and

15V.

The LM2990 uses new circuit design techniques to provide low dropout and low quiescent current.

Key Features

  • n n n n n n n 5% output accuracy over entire operating range Output current in excess of 1A Dropout voltage typically 0.6V at 1A load Low quiescent current Internal short circuit current limit Internal thermal shutdown with hysteresis Functional complement to the LM2940 series.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LM2-990.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
LM2990 Negative Low-Dropout Regulator Texas Instruments
LM2990QML Negative Low Dropout Regulator Texas Instruments
LM2991 Negative Low-Dropout Adjustable Regulator Texas Instruments
LM2991QML Negative Low-Dropout Adjustable Regulator Texas Instruments
LM2900 QUADRUPLE NORTON OPERATIONAL AMPLIFIER Texas Instruments

Other Datasheets by National Semiconductor (now Texas Instruments)

Part Number Description
LM299 Precision Reference
LM2991 Negative Low Dropout Adjustable Regulator
LM299A Precision Reference
LM2900 LM2900/LM3900/LM3301 Quad Amplifiers
LM2901 Low Power Low Offset Voltage Quad Comparators

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
LM2990 Negative Low Dropout Regulator June 1999 LM2990 Negative Low Dropout Regulator General Description The LM2990 is a three-terminal, low dropout, 1 ampere negative voltage regulator available with fixed output voltages of −5, −5.2, −12, and −15V. The LM2990 uses new circuit design techniques to provide low dropout and low quiescent current. The dropout voltage at 1A load current is typically 0.6V and a guaranteed worst-case maximum of 1V over the entire operating temperature range. The quiescent current is typically 1 mA with 1A load current and an input-output voltage differential greater than 3V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropout mode (VOUT − VIN ≤ 3V).